Btw, here is the output from my check (based on linux next from a few days ago). There are some false positives because Smatch parses __pow10() incorrectly etc but it's mostly correct. regards, dan carpenter drivers/mtd/spi-nor/core.c:2896 spi_nor_late_init_params() warn: unnecessary div64_u64(): divisor = '2-255' drivers/mtd/spi-nor/core.c:3409 spi_nor_set_mtd_eraseregions() warn: unnecessary div64_u64(): divisor = '1-u32max' drivers/hwmon/occ/common.c:467 occ_get_powr_avg() warn: unnecessary div64_u64(): divisor = '1-u32max' drivers/hwmon/occ/common.c:702 occ_store_caps_user() warn: unnecessary div64_u64(): divisor = '1000000' drivers/hwmon/scmi-hwmon.c:67 scmi_hwmon_scale() warn: unnecessary div64_u64(): divisor = '1,10' drivers/infiniband/hw/cxgb4/device.c:160 wr_log_show() warn: unnecessary div64_u64(): divisor = '1000' drivers/infiniband/hw/cxgb4/device.c:161 wr_log_show() warn: unnecessary div64_u64(): divisor = '1000' drivers/clk/clk-versaclock7.c:743 vc7_get_apll_rate() warn: unnecessary div64_u64(): divisor = '2-31' drivers/clk/clk-versaclock7.c:794 vc7_calc_fod_1st_stage_rate() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/clk/clk-versaclock7.c:812 vc7_calc_fod_2nd_stage_rate() warn: unnecessary div64_u64(): divisor = '2-u32max' drivers/clk/clk-versaclock7.c:973 vc7_iod_recalc_rate() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/clk/clk-versaclock7.c:990 vc7_iod_round_rate() warn: unnecessary div64_u64(): divisor = '14-33554431' drivers/clk/clk-versaclock7.c:1016 vc7_iod_set_rate() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/clk/clk-si570.c:263 si570_round_rate() warn: unnecessary div64_u64(): divisor = '2' drivers/pci/setup-bus.c:1909 pci_bus_distribute_available_resources() warn: unnecessary div64_u64(): divisor = '1-u32max' drivers/pci/setup-bus.c:1910 pci_bus_distribute_available_resources() warn: unnecessary div64_u64(): divisor = '1-u32max' drivers/pci/setup-bus.c:1911 pci_bus_distribute_available_resources() warn: unnecessary div64_u64(): divisor = '1-u32max' drivers/pci/setup-bus.c:1914 pci_bus_distribute_available_resources() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/pci/setup-bus.c:1915 pci_bus_distribute_available_resources() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/pci/setup-bus.c:1916 pci_bus_distribute_available_resources() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/tty/serial/serial_core.c:431 uart_update_timeout() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/ptp/ptp_qoriq.c:224 ptp_qoriq_adjfine() warn: unnecessary div64_u64(): divisor = '2' drivers/ptp/ptp_dte.c:150 ptp_dte_adjfine() warn: unnecessary div64_u64(): divisor = '125000000' drivers/ptp/ptp_dte.c:152 ptp_dte_adjfine() warn: unnecessary div64_u64(): divisor = '125000000' drivers/gpu/drm/radeon/si_dpm.c:2200 si_calculate_power_efficiency_ratio() warn: unnecessary div64_u64(): divisor = '1000' drivers/gpu/drm/radeon/si_dpm.c:2202 si_calculate_power_efficiency_ratio() warn: unnecessary div64_u64(): divisor = '1-4294836225' drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi.c:356 rcar_mipi_dsi_pll_calc() warn: unnecessary div64_u64(): divisor = '0-255' drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi.c:361 rcar_mipi_dsi_pll_calc() warn: unnecessary div64_u64(): divisor = '0-u16max' drivers/gpu/drm/amd/amdgpu/../pm/legacy-dpm/si_dpm.c:2351 si_calculate_power_efficiency_ratio() warn: unnecessary div64_u64(): divisor = '1000' drivers/gpu/drm/amd/amdgpu/../pm/legacy-dpm/si_dpm.c:2353 si_calculate_power_efficiency_ratio() warn: unnecessary div64_u64(): divisor = '1-4294836225' drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:1673 amdgpu_ras_sysfs_badpages_read() warn: unnecessary div64_u64(): divisor = '28' drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:1674 amdgpu_ras_sysfs_badpages_read() warn: unnecessary div64_u64(): divisor = '28' drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:592 populate_subvp_cmd_drr_info() warn: unnecessary div64_u64(): divisor = '2' drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dce110/dce110_hwseq.c:807 dce110_edp_power_control() warn: unnecessary div64_u64(): divisor = '1000000' drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dce110/dce110_hwseq.c:812 dce110_edp_power_control() warn: unnecessary div64_u64(): divisor = '1000000' drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dce110/dce110_hwseq.c:935 dce110_edp_wait_for_T12() warn: unnecessary div64_u64(): divisor = '1000000' drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_edp_panel_control.c:765 edp_setup_psr() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_edp_panel_control.c:765 edp_setup_psr() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:800 kbps_to_peak_pbn() warn: unnecessary div64_u64(): divisor = '432000' drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_psr.c:160 amdgpu_dm_psr_enable() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_psr.c:160 amdgpu_dm_psr_enable() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/gpu/drm/amd/amdgpu/../display/modules/freesync/freesync.c:106 calc_duration_in_us_from_refresh_in_uhz() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/gpu/drm/amd/amdgpu/../display/modules/freesync/freesync.c:117 calc_duration_in_us_from_v_total() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/gpu/drm/amd/amdgpu/../display/modules/freesync/freesync.c:132 mod_freesync_calc_v_total_from_refresh() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/gpu/drm/amd/amdgpu/../display/modules/freesync/freesync.c:135 mod_freesync_calc_v_total_from_refresh() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/gpu/drm/amd/amdgpu/../display/modules/freesync/freesync.c:135 mod_freesync_calc_v_total_from_refresh() warn: unnecessary div64_u64(): divisor = '1000000' drivers/gpu/drm/amd/amdgpu/../display/modules/freesync/freesync.c:169 calc_v_total_from_duration() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/gpu/drm/amd/amdgpu/../display/modules/freesync/freesync.c:169 calc_v_total_from_duration() warn: unnecessary div64_u64(): divisor = '1000' drivers/gpu/drm/amd/amdgpu/../display/modules/freesync/freesync.c:201 update_v_total_for_static_ramp() warn: unnecessary div64_u64(): divisor = '1000000' drivers/gpu/drm/amd/amdgpu/../display/modules/freesync/freesync.c:200 update_v_total_for_static_ramp() warn: unnecessary div64_u64(): divisor = '1000-4467765' drivers/gpu/drm/amd/amdgpu/../display/modules/freesync/freesync.c:207 update_v_total_for_static_ramp() warn: unnecessary div64_u64(): divisor = '1000' drivers/gpu/drm/amd/amdgpu/../display/modules/freesync/freesync.c:214 update_v_total_for_static_ramp() warn: unnecessary div64_u64(): divisor = '16666' drivers/gpu/drm/amd/amdgpu/../display/modules/freesync/freesync.c:245 update_v_total_for_static_ramp() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/gpu/drm/amd/amdgpu/../display/modules/freesync/freesync.c:245 update_v_total_for_static_ramp() warn: unnecessary div64_u64(): divisor = '1000' drivers/gpu/drm/amd/amdgpu/../display/modules/freesync/freesync.c:1004 mod_freesync_build_vrr_params() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/acpi/cppc_acpi.c:1855 cppc_perf_to_khz() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/acpi/cppc_acpi.c:1863 cppc_perf_to_khz() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/acpi/cppc_acpi.c:1885 cppc_khz_to_perf() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/leds/rgb/leds-qcom-lpg.c:458 lpg_calc_freq() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/leds/rgb/leds-qcom-lpg.c:464 lpg_calc_freq() warn: unnecessary div64_u64(): divisor = '1024' drivers/md/dm-cache-policy-smq.c:1750 __smq_create() warn: unnecessary div64_u64(): divisor = '64-2097152' drivers/md/dm-verity-fec.c:764 verity_fec_ctr() warn: unnecessary div64_u64(): divisor = '512-130560' drivers/pwm/pwm-lpc32xx.c:48 lpc32xx_pwm_config() warn: unnecessary div64_u64(): divisor = 's32min-s32max' drivers/pwm/pwm-bcm-iproc.c:138 iproc_pwmc_apply() warn: unnecessary div64_u64(): divisor = '1000000000' drivers/pwm/pwm-bcm-iproc.c:140 iproc_pwmc_apply() warn: unnecessary div64_u64(): divisor = '1000000000' drivers/pwm/pwm-sifive.c:95 pwm_sifive_update_clock() warn: unnecessary div64_u64(): divisor = '1000000000' drivers/pwm/pwm-spear.c:98 spear_pwm_config() warn: unnecessary div64_u64(): divisor = '1000000000' drivers/pwm/pwm-spear.c:100 spear_pwm_config() warn: unnecessary div64_u64(): divisor = '1000000000' drivers/media/i2c/st-vgxy61.c:482 get_pixel_rate() warn: unnecessary div64_u64(): divisor = '0-255' drivers/media/i2c/st-vgxy61.c:569 vgxy61_check_bw() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/media/i2c/ds90ub913.c:642 ub913_i2c_master_init() warn: unnecessary div64_u64(): divisor = '1000000000' drivers/media/i2c/ds90ub913.c:643 ub913_i2c_master_init() warn: unnecessary div64_u64(): divisor = '1000000000' drivers/media/i2c/ds90ub953.c:832 ub953_i2c_master_init() warn: unnecessary div64_u64(): divisor = '1000000000' drivers/media/i2c/ds90ub953.c:833 ub953_i2c_master_init() warn: unnecessary div64_u64(): divisor = '1000000000' drivers/media/platform/ti/vpe/sc.c:202 sc_config_scaler() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/media/dvb-core/dvb_demux.c:425 dvb_dmx_swfilter_packet() warn: unnecessary div64_u64(): divisor = '1024' drivers/scsi/sym53c8xx_2/sym_hipd.c:749 sym_prepare_setting() warn: unnecessary div64_u64(): divisor = '40000-2560000' drivers/video/fbdev/omap2/omapfb/dss/dsi.c:4773 dsi_vm_calc() warn: unnecessary div64_u64(): divisor = 's32min-s32max' drivers/video/fbdev/omap2/omapfb/dss/dsi.c:4780 dsi_vm_calc() warn: unnecessary div64_u64(): divisor = 's32min-s32max' drivers/cpufreq/cppc_cpufreq.c:124 cppc_scale_freq_workfn() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/pinctrl/ti/pinctrl-ti-iodelay.c:192 ti_iodelay_compute_dpe() warn: unnecessary div64_u64(): divisor = '176-34602480' drivers/net/wireless/intel/iwlwifi/mvm/ptp.c:55 iwl_mvm_ptp_get_adj_time() warn: unnecessary div64_u64(): divisor = '1000' drivers/net/ethernet/xilinx/xilinx_axienet_main.c:240 axienet_usec_to_timer() warn: unnecessary div64_u64(): divisor = '125000000' drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:407 bnxt_get_target_cycles() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c:1262 hw_atl_b0_adj_params_get() warn: unnecessary div64_u64(): divisor = '1000000000' drivers/net/ethernet/engleder/tsnep_selftests.c:164 delay_base_time() warn: unnecessary div64_u64(): divisor = '62500,100000,200000,333333,400000,411854,500000,1000000,1500000,1700000,2000000,6000000' drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c:301 mlxsw_sp1_ptp_clock_init() warn: unnecessary div64_u64(): divisor = '3435819912' drivers/net/ethernet/mellanox/mlx5/core/en/htb.c:263 mlx5e_htb_convert_rate() warn: unnecessary div64_u64(): divisor = '1-u32max' drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c:519 find_target_cycles() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c:966 mlx5_init_overflow_period() warn: unnecessary div64_u64(): divisor = '0-u32max' drivers/net/ethernet/intel/ice/ice_ptp.c:1717 ice_ptp_cfg_clkout() warn: unnecessary div64_u64(): divisor = '1000000000' drivers/base/arch_topology.c:406 topology_init_cpu_capacity_cppc() warn: unnecessary div64_u64(): divisor = '0-u32max' block/blk-iolatency.c:441 check_scale_change() warn: unnecessary div64_u64(): divisor = '100' block/blk-iolatency.c:266 iolat_update_total_lat_avg() warn: unnecessary div64_u64(): divisor = '250000000' block/blk-iolatency.c:236 latency_sum_ok() warn: unnecessary div64_u64(): divisor = '10' block/blk-iolatency.c:955 iolatency_pd_stat() warn: unnecessary div64_u64(): divisor = '1000' block/blk-iolatency.c:956 iolatency_pd_stat() warn: unnecessary div64_u64(): divisor = '1000000' block/blk-iocost.c:706 abs_cost_to_cost() warn: unnecessary div64_u64(): divisor = '0-u32max' block/blk-iocost.c:714 cost_to_abs_cost() warn: unnecessary div64_u64(): divisor = '65536' block/blk-iocost.c:797 ioc_refresh_period_us() warn: unnecessary div64_u64(): divisor = '100' block/blk-iocost.c:831 ioc_autop_idx() warn: unnecessary div64_u64(): divisor = '137438' block/blk-iocost.c:943 ioc_refresh_params_disk() warn: unnecessary div64_u64(): divisor = '1000000' block/blk-iocost.c:945 ioc_refresh_params_disk() warn: unnecessary div64_u64(): divisor = '1000000' block/blk-iocost.c:1015 ioc_adjust_base_vrate() warn: unnecessary div64_u64(): divisor = '100' block/blk-iocost.c:1018 ioc_adjust_base_vrate() warn: unnecessary div64_u64(): divisor = '100' block/blk-iocost.c:1030 ioc_adjust_base_vrate() warn: unnecessary div64_u64(): divisor = '100' block/blk-iocost.c:1365 iocg_kick_delay() warn: unnecessary div64_u64(): divisor = '1000000' block/blk-iocost.c:1618 ioc_lat_stat() warn: unnecessary div64_u64(): divisor = '0-u32max' block/blk-iocost.c:1762 hweight_after_donation() warn: unnecessary div64_u64(): divisor = '65536' block/blk-iocost.c:1990 transfer_surpluses() warn: unnecessary div64_u64(): divisor = '0-65536' block/blk-iocost.c:1999 transfer_surpluses() warn: unnecessary div64_u64(): divisor = '65536' block/blk-iocost.c:2004 transfer_surpluses() warn: unnecessary div64_u64(): divisor = '0-u32max' block/blk-iocost.c:2009 transfer_surpluses() warn: unnecessary div64_u64(): divisor = '0-u32max' block/blk-iocost.c:2013 transfer_surpluses() warn: unnecessary div64_u64(): divisor = '0-u32max' block/blk-iocost.c:2016 transfer_surpluses() warn: unnecessary div64_u64(): divisor = '0-u32max' block/blk-iocost.c:2020 transfer_surpluses() warn: unnecessary div64_u64(): divisor = '0-u32max' block/blk-iocost.c:2044 transfer_surpluses() warn: unnecessary div64_u64(): divisor = '0-u32max' block/blk-iocost.c:2213 ioc_check_iocgs() warn: unnecessary div64_u64(): divisor = '65536' block/blk-iocost.c:2823 ioc_rqos_done() warn: unnecessary div64_u64(): divisor = '137' block/blk-iocost.c:3047 ioc_pd_stat() warn: unnecessary div64_u64(): divisor = '137438' fs/bcachefs/tests.c:788 btree_perf_test_thread() warn: unnecessary div64_u64(): divisor = '0-u32max' fs/bcachefs/alloc_background.c:2261 bch2_recalc_capacity() warn: unnecessary div64_u64(): divisor = '100' fs/btrfs/block-group.c:2793 calculate_global_root_id() warn: unnecessary div64_u64(): divisor = '134217728,1073741824' fs/nilfs2/the_nilfs.c:416 nilfs_max_segment_count() warn: unnecessary div64_u64(): divisor = '16-u32max' fs/f2fs/gc.c:568 atgc_lookup_victim() warn: unnecessary div64_u64(): divisor = '0-u32max' fs/f2fs/iostat.c:23 iostat_get_avg_bytes() warn: unnecessary div64_u64(): divisor = '0' kernel/trace/trace_benchmark.c:107 trace_do_benchmark() warn: unnecessary div64_u64(): divisor = '0,2-u32max' kernel/trace/trace_benchmark.c:129 trace_do_benchmark() warn: unnecessary div64_u64(): divisor = '1-u32max' kernel/trace/trace_events_hist.c:701 hist_field_get_div_fn() warn: unnecessary div64_u64(): divisor = '1-1048576' kernel/trace/trace_events_hist.c:5430 __get_percentage() warn: unnecessary div64_u64(): divisor = '10000' kernel/dma/map_benchmark.c:82 map_benchmark_thread() warn: unnecessary div64_u64(): divisor = '100' kernel/dma/map_benchmark.c:83 map_benchmark_thread() warn: unnecessary div64_u64(): divisor = '100' kernel/fork.c:1011 set_max_threads() warn: unnecessary div64_u64(): divisor = '131072' sound/usb/mixer_quirks.c:2353 snd_rme_current_freq_get() warn: unnecessary div64_u64(): divisor = '1-u32max' sound/soc/sof/ipc4-mtrace.c:432 ipc4_mtrace_enable() warn: unnecessary div64_u64(): divisor = '1000' sound/soc/sti/uniperif_player.c:182 uni_player_clk_set_rate() warn: unnecessary div64_u64(): divisor = '1000000' net/netfilter/xt_hashlimit.c:498 user2credits() warn: unnecessary div64_u64(): divisor = '32000' net/netfilter/xt_hashlimit.c:498 user2credits() warn: unnecessary div64_u64(): divisor = '31' net/netfilter/xt_hashlimit.c:500 user2credits() warn: unnecessary div64_u64(): divisor = '10000,1000000' net/ipv4/inetpeer.c:79 inet_initpeers() warn: unnecessary div64_u64(): divisor = '19200'
